JPS63267893A - Layered type heat exchanger - Google Patents

Abstract

PURPOSE:To simplify the whole of a heat exchanger, to facilitate manufacture, and to reduce the weight and the cost, by a method wherein an outer cylinder and a manifold mechanism are formed by fiber-reinforced plastic. CONSTITUTION:The outer peripheral surface of a heat exchanger body 7 and the outer peripheral surface of each of elements 22 of manifold mechanisms 21a and 21b are integrally covered with an outer cylinder 25, and the outer cylinder 25 is formed by fiber-reinforced plastic. First, the manifold mechanisms 21a and 21b are adhered and connected to the two end surfaces of the heat exchanger body 7, and an uncured fiber-reinforced plastic layer is formed on the outer peripheral surface of the heat exchanger body 7 of the bonded substance and the outer peripheral surface of each of the elements 22 of the manifold mechanisms 21a and 21b thereof. In this case, through regulation of a direction of fiber, the coefficient of thermal expansion of a finally produced outer cylinder 25 is coincided with that of the heat transfer body 7. As noted above, an uncured fiber plastic layer is formed in a given thickness, and thereafter, the plastic layer is thermally cured.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a single layer heat exchanger.

(Prior Art) Conventionally, a stacked heat exchanger is known as a small heat exchanger that is incorporated into a refrigeration system or the like. The main parts of this stacked heat exchanger are shown in Figure 3.

A heat exchanger plate 1 made of, for example, a disk-shaped thin plate of aluminum having good heat and conductivity, and a heat insulating plate 2 formed of a thin plate of 111M reinforced plastic or the like with the same diameter as the heat exchanger plate 1. As shown in FIG. 4, it has a laminate structure in which layers are alternately stacked. Each heat insulating plate 2 has slit-like holes 3 formed in a radial manner for allowing a first fluid to flow therethrough, and holes 4 for allowing a second fluid to flow between these holes 3. has been done. Further, a plurality of holes 5 are formed at positions corresponding to the holes 3 of the heat exchanger plate 1, and a plurality of holes 6 are further formed at positions corresponding to the holes 4. Then, both plates 1 are arranged so that the holes 3 of the heat insulating plate 2 and the holes 5 of the heat exchanger plate 1 and the holes 4 of the heat insulating plate 2 and the holes 6 of the heat exchanger plate 1 communicate with each other.
. There is.

Therefore, as shown in FIG. 5, the heat exchanger main body 7 includes first fluid passages 8 in which the holes 3 and 5 are connected alternately,
This means that second fluid passages 9 in which holes 4 and holes 6 are alternately connected extend in parallel to the stacking direction.

When using this heat exchanger main body 7, high temperature fluid is passed through the first fluid passage 8 as shown by the solid line arrow in the figure, and high temperature fluid is passed through the second fluid passage 9 as shown by the broken line arrow in the figure. A low-temperature fluid is passed through the two fluids, and heat is exchanged between the two fluids via a heat exchanger plate 1.

By the way, in the case of a laminated heat exchanger in which the heat exchanger main body 7 is configured as described above, only one main body is protected.

In order to prevent fluid leakage from the main body and to facilitate installation, the heat exchanger main body 7 is usually housed in a metal pressure vessel 10 as shown in FIG. The manifold mechanism 11 is connected to the first and second fluid passages 8°9.
It has a structure that connects. In this manner, the following points are taken into consideration when housing the product in the pressure-resistant container 10 and connecting it with the manifold mechanism 11 within the pressure-resistant container 10. That is, the heat exchanger body 7
9 Usually, the heat exchanger plate 1 and the heat insulating plate 2 are connected by the number 1 through adhesive.
00 sheets are laminated. Therefore, it is difficult to match the amount of thermal expansion or contraction of the heat exchanger body 7 with that of the pressure vessel 10.

In order to solve this problem, the inner diameter of the pressure vessel 10 is set larger than the outer diameter of the heat exchanger body 7. With this setting, a gap 12 will inevitably be created between the outer circumferential surface of the heat exchanger main body 7 and the inner circumferential surface of the pressure vessel 10. On the other hand, in order to simplify the structure, the manifold mechanism 11 has a structure in which the space 13 existing between the end face of the heat exchanger main body 7 and the side wall of the pressure vessel 10 opposing this is used as one flow path. things are used. Therefore, a part of the fluid flowing through one of the channels does not pass through the inside of the heat exchanger body 7, and the outer peripheral surface of the heat exchanger body 7 and the pressure vessel 1
There is a possibility that it may be bypassed through the gap 12 that exists between the inner peripheral surface of 0 and the inner peripheral surface of 0. If a bypass path is formed, the heat exchange efficiency will inevitably decrease. Therefore, it is necessary to substantially eliminate the gap 12 by some means. In addition, since the heat exchanger body 7 is a laminate in which something with an uncertain thickness such as an adhesive is interposed, the length of the obtained heat exchanger body 7 in the stacking direction differs one by one. It's easy to become a thing. Therefore, by any means.

It is also necessary to ensure that the above-mentioned irregularities do not affect assembly. Furthermore, in order to be able to use it in any location, it must also have sufficient earthquake resistance. In order to stably install the heat exchanger main body 7 in the pressure vessel 10 as described above, all the above-mentioned requirements must be met.

For this reason, in the conventional laminated heat exchanger, the pressure vessel 10 is made of a metal material such as stainless steel, and the outer peripheral surface of one manifold mechanism 11 is made of a metal material such as stainless steel. By welding the heat exchanger body 7 to the pressure vessel 10, it is possible to avoid it from entering the gap 12, and by interposing the bellows 14 in the other manifold mechanism 11, it is possible to absorb uneven lengths in the stacking direction of the heat exchanger main body 7 and improve earthquake resistance. A structure has been adopted to improve the performance.

However, in the conventional laminated heat exchanger configured as described above, since the pressure vessel 10 is formed of a metal material, a large amount of heat is transferred through the pressure vessel 1o, and this is the cause. The problem was that the heat exchange efficiency was low. Further, since the bellows 14 is used, the metal body becomes expensive and complicated, and there are also problems in that reliability is low.

(Problems to be Solved by the Invention) As mentioned above, conventional laminated heat exchangers not only have low heat exchange efficiency, but also have a complicated structure and are difficult to manufacture, and are expensive as a whole. There was a problem of

Therefore, an object of the present invention is to provide a laminated heat exchanger that can solve all of the above-mentioned problems.

[Structure of the invention] (Means for solving problems) The present invention is housed within the outer cylinder.

A fluid passage partitioned by the heat transfer plates, the heat insulating plates, and the adhesive is formed in the stacking direction in a laminate in which heat transfer plates and heat insulating plates are laminated alternately with an adhesive interposed between them. and the heat exchanger body.

An M4-layer heat exchanger comprising at least a pair of manifold mechanisms respectively connected to both end faces of the heat exchanger body in the stacking direction for connecting the fluid passages of the heat exchanger body to external piping.

The outer cylinder and the manifold mechanism are made of fiber-reinforced plastic.

(Function) [ff Reinforced plastic layers generally have lower thermal conductivity than metal materials. Therefore, since the amount of heat transferred via the outer cylinder can be reduced, the heat exchange efficiency can be improved. Further, the coefficient of thermal expansion of the #A fiber plastic layer can be adjusted by adjusting the fiber direction of the base material. Therefore, with the heat exchanger body in advance! A manifold made of IN reinforced plastic is manufactured in advance, and with the manifold mechanism applied to both end faces of the heat exchanger body, the heat of the heat exchanger body is applied to the outer periphery of the heat exchanger body and the outer periphery of the manifold mechanism. If an uncured fiber-reinforced plastic layer is provided while adjusting the fiber direction to match the expansion coefficient, and then thermally cured, there will be a difference in the coefficient of thermal expansion between the plastic layer and the heat exchanger body. This means that it is possible to form an outer cylinder with no gap between it and the outer peripheral surface of the exchanger main body. In addition, after forming the heat exchanger body as described above, it is possible to form the outer cylinder to fit the body, so even if the lengths of the heat exchanger body in the stacking direction are uneven, the same There is no problem.

Therefore, the use of unreliable elements such as bellows can be eliminated, and it can also contribute to easier manufacturing.

(Example) An embodiment will be described below with reference to one drawing.

FIG. 1 shows a stacked heat exchanger according to an embodiment of the present invention, and the same parts as in FIG. 6 are designated by the same symbols.

That is, 7 in FIG. 1 is a heat exchanger main body configured similarly to a conventional laminated heat exchanger. A manifold mechanism 21 is provided on both end surfaces of the heat exchanger body 7 for connecting two fluid passages formed in the heat exchanger body 7 to two external pipes.
a and 21b are connected via an adhesive or the like. The manifold mechanisms 21a and 21b are composed of elements 22, 23, and 24 made of fiber-reinforced plastic, and these elements are connected in the illustrated relationship via an adhesive or the like.

On the other hand, the outer peripheral surface of the heat exchanger main body 7 and the outer peripheral surface of each element 22 in the manifold mechanisms 21a and 21b are
It is integrally covered by 5.

The outer cylinder 25 is made of fiber-reinforced plastic, and is specifically provided as follows.

That is, first, the manifold i structures 21a and 21b are adhesively connected to both end surfaces of the heat exchanger main body 7, and the outer circumferential surface of the heat exchanger main body 7 and each manifold 21a,
An uncured fiber-reinforced brush stick layer is provided on the outer peripheral surface of each element 22 of 21b. At this time, the outside v which is finally formed by adjusting the I direction etc. The coefficient of thermal expansion of 425 is made to match the coefficient of thermal expansion of the heat exchanger body 7. As described above, an uncured fiber plastic layer is provided to a predetermined thickness, and then this plastic layer is thermoset.

In the stacked heat exchanger configured as above.

The outer cylinder 25 and the manifold mechanisms 21a and 21b are
It is made of fiber-reinforced plastic.

Compared to the case where the outer cylinder and manifold mechanism are formed of metal materials, the amount of heat transferred through these can be reduced. Therefore, heat exchange efficiency can be improved. Furthermore, since the coefficient of thermal expansion of the fiber-reinforced plastic layer can be adjusted by adjusting the fiber direction of the base material, the heat exchanger main body 7 and the manifold mechanisms 21a and 21b of fiber-reinforced plastics are assembled in advance as described above. With the manifold mechanisms 21a and 21b applied to both end surfaces of the heat exchanger body 7, the thermal expansion coefficient of the heat exchanger body 7 is applied to the outer periphery of the heat exchanger body 7 and the outer periphery of the manifolds 11M21a and 21b. uncured II while adjusting the m-fiber direction to match the
If the N-reinforced plastic layer is heat-cured after being provided, there will be a difference in thermal expansion coefficient between the layer and the heat exchanger body 7, and a gap may exist between the layer and the outer peripheral surface of the heat exchanger body 7. It is possible to form an outer cylinder 25 that does not Therefore, problems caused by differences in thermal expansion coefficients can be easily resolved. Further, after forming the heat exchanger main body 7, it is possible to form the outer cylinder 25 to fit the heat exchanger main body 7. ill! Easily accommodates uneven lengths in different directions. therefore.

The use of unreliable elements such as bellows can be eliminated, manufacturing can be facilitated, and the overall weight can be reduced and the dimensions in the stacking direction can be shortened. In addition, according to experiments, when comparing the heat exchange efficiency with a conventional heat exchanger by making the outer diameter and overall length of the heat exchanger body the same, it was found that the heat exchange efficiency was 3ONm/
It was possible to improve the flow rate from 95% to 97% at a flow rate of h.

FIG. 2 shows a stacked heat exchanger according to another embodiment of the present invention, in which the same parts as in FIG. 1 are designated by the same reference numerals.

Therefore, explanation of the overlapping portion will be omitted.

This embodiment differs from the embodiment shown in FIG. 1 in the configuration of manifold mechanisms 121a and 121b.

The manifold mechanisms 121a and 121b each include an element 1 made of a fiber-reinforced plastic material and having a disk shape.
It is mainly composed of 22.123. element 122
, 123, these elements 122 and 123 are aligned and stacked, and when applied to both end surfaces of the heat exchanger body 7 in this state, two fluid passages provided in the heat exchanger body 7 are connected. A flow passage hole to be connected is formed. The outer circumferential surfaces of these elements 122 and 123 are commonly covered by an outer layer 25. Note that in FIG. 9, reference numerals 124 and 125 indicate a connecting pipe, which is also made of fiber-reinforced plastic material and is connected to the channel hole of the element 123 via an adhesive or the like.

With such a configuration, the same effects as in the previous embodiment can be obtained, and the plate-like elements 122 and 123 are combined to form the manifold mechanism 121a.

121b, the manifold mechanism 121
The volume occupied by a and 121b can be reduced.

This not only shortens the overall axial length but also reduces pressure loss in the manifold mechanisms 121a and 121b.

Note that the present invention is not limited to the embodiments described above. That is, in each of the embodiments described above, the heat exchanger main body is configured in a cylindrical shape, but it may also be configured in a prismatic shape.

[Effects of the Invention] As described above, according to the second invention, since elements other than the heat exchanger main body are formed of fiber reinforced plastic, the coefficient of thermal expansion and the length in the stacking direction of the heat exchanger main body can be reduced. It is possible to easily deal with irregularities, simplify the entire structure, make it easier to manufacture, reduce the overall weight, and lower the price, as well as improve the efficiency of the heat exchanger.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a laminated heat exchanger according to an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view of a laminated heat exchanger according to another embodiment of the present invention, and FIG. Fig. 4 is a perspective view of the heat exchanger main body, and Fig. 5 is an exploded perspective view of the elements constituting the heat exchanger main body of a type heat exchanger. The local view, FIG. 6, is a longitudinal sectional view of a conventional stacked heat exchanger. 7... Heat exchanger main body, 21a, 21b, 121a. 121b... Manifold mechanism, 25... Outer cylinder. Applicant's agent Patent attorney Takehiko Suzue Figure 3 Figure 4 Figure 5 Figure 6 Reason

Claims (2)

[Claims] (1) An outer cylinder, and a laminate that is housed in the outer cylinder and has heat transfer plates and heat insulating plates stacked alternately with an adhesive interposed between them, and includes the heat transfer plate and the heat insulating plate. and a heat exchanger body formed by forming fluid passages partitioned by the adhesive in the stacking direction, and both ends of the heat exchanger body in the stacking direction for connecting the fluid passages of the heat exchanger body to external piping. What is claimed is: 1. A laminated heat exchanger comprising at least a pair of manifold mechanisms connected to respective surfaces, wherein the outer cylinder and the manifold mechanism are made of fiber-reinforced plastic. (2) The outer cylinder is formed by providing an uncured fiber plastic layer on the outer periphery of the structure in which the manifold mechanism is applied to both end faces of the heat exchanger main body in the stacking direction, and then heat-curing this plastic layer. 2. The laminated heat exchanger according to claim 1, wherein the laminated heat exchanger is formed by: